Field trials were conducted in Georgia, North Carolina, and Texas to evaluate the effects of preplant applications of 2,4-D, dicamba, tribenuron, and tribenuron plus thifensulfuron on peanut yield. Herbicides were applied 30, 15, 7, or 0 d before planting (DBP) in conventional production systems in Georgia and Texas, and 28, 21, 14, 7, and 0 DBP in no- and strip-tillage systems in North Carolina. Amine and ester formulations of 2,4-D did not affect peanut yield at any time of application in any state. Dicamba reduced peanut yield when applied at 0 DBP in two of seven trials. Tribenuron did not affect peanut yield regardless of preplant interval. However, tribenuron plus thifensulfuron reduced yields when applied at 7 DBP in one of five trials. These data suggest that 2,4-D, tribenuron, and tribenuron plus thifensulfuron can be safely used for preplant weed control in peanut when applied 7 DBP. Dicamba should be applied a minimum of 15 DBP.
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Keywords: Arachis hypogaea, burndown weed control, crop tolerance, reduced tillage
How to Cite:
Prostko, E. & Grey, T. & Johnson, W. & Jordan, D. & Grichar, W. & Besler, B. & Brewer, K. & Eastin, E., (2003) “Influence of Preplant Applications of 2,4-D, Dicamba, Tribenuron, and Tribenuron Plus Thifensulfuron on Peanut”, Peanut Science 30(1), p.18-22. doi: https://doi.org/10.3146/pnut.30.1.0004